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Originally Posted by olly986
hi
here the unleaded is 95 and super unleaded 98 so does this means that their is more cleaners or solvent in them?
how come a world company car recommends different petroleum for the same car depending on where it is driven, 98 is NOT recommended here by the way and 95 should be used for the Boxster
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The octane rating is NOT related to the amount of cleaning agents in the gas. Chevron regular grade (say 87) has techron in it while the Costco premium does not.
I would guess the diff octane reqs listed are in response to diff regulations around gas that pop up in diff countries or in the case of the US, diff states.